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Related Concept Videos

Design Example01:23

Design Example

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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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Buffers: Overview01:30

Buffers: Overview

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Buffers play a crucial role in stabilizing the pH of a solution by mitigating the effects of small amounts of added acid or base. They consist of a weak acid and its conjugate base or a weak base and its conjugate acid. A solution of acetic acid and sodium acetate is an example of a buffer that consists of a weak acid and its salt: CH3COOH (aq) + CH3COONa (aq). An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride: NH3 (aq) + NH4Cl (aq).
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Design Consideration01:22

Design Consideration

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Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
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Manipulation and Analysis01:21

Manipulation and Analysis

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GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
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Methods of Documentation V: CBE01:23

Methods of Documentation V: CBE

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Charting by Exception, or CBE, is a method of documentation used in healthcare, particularly in nursing, that focuses on documenting only significant or abnormal findings rather than recording every detail. This approach aims to streamline the documentation process, improve efficiency, and ensure that healthcare providers can quickly identify deviations from normalcy in patient assessments.
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Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

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This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
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Related Experiment Video

Updated: May 20, 2025

Large-Scale Screens of Metagenomic Libraries
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BEscreen: a versatile toolkit to design base editing libraries.

Philipp G Schneider1,2, Shuang Liu1,2, Lars Bullinger1,3,4

  • 1Department of Hematology, Oncology, and Tumor Immunology, Charité-Universitätsmedizin Berlin, 13353 Berlin, Germany.

Nucleic Acids Research
|May 19, 2025
PubMed
Summary
This summary is machine-generated.

BEscreen is a new computational tool for designing base editing screens. It supports variant, gene, and region-centric approaches, enabling scalable genetic variant analysis for phenotypic effects.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Base editing facilitates high-throughput screening of genetic variants to understand their phenotypic effects.
  • Designing single guide RNA (sgRNA) libraries is crucial for gene- or variant-centric base editing screens.
  • Existing computational tools lack versatility and scalability for diverse sgRNA library design needs.

Purpose of the Study:

  • Introduce BEscreen, a comprehensive tool for designing base editing guide RNAs.
  • Provide a versatile and scalable solution for various base editing screening approaches.
  • Facilitate the design of sgRNA libraries for genetic variant analysis.

Main Methods:

  • BEscreen offers web server and command-line interfaces for accessibility.
  • Supports variant-centric (genomic coordinates, amino acid changes, rsIDs), gene-centric (near-saturation libraries), and region-centric (all possible guides) design modes.
  • Includes options for selecting guides by biological consequence, customizing base editor characteristics, and integrating Ensembl's Variant Effect Predictor for annotation.

Main Results:

  • BEscreen provides a versatile platform for designing base editing screens.
  • Accommodates a wide range of screening strategies, from individual variants to large-scale libraries.
  • Enables customizable and scalable sgRNA library design for phenotypic screening.

Conclusions:

  • BEscreen is a highly versatile tool for designing base editing screens.
  • Offers seamless scalability for diverse use cases, from single variants to saturation libraries.
  • Empowers researchers to efficiently design and execute base editing screens for genetic variant analysis.